The caldron of the invention comprises a cylindrical caldron main body having a raw material charge port for charging a water-added raw material to be boiled and a discharge port for discharging a boiled raw material, both ports being disposed near to both the closed ends of the caldron main body and...http://www.google.fr/patents/US6131504?utm_source=gb-gplus-shareBrevet US6131504 - Boiling pot
